I NEED HELP WITH HOMEWORK AS SOON AS POSSIBLE PLEASE IF POSSIBLE EVEN TODAY

I HAVE A COUPLE OF PROBLEMS I DON'T REALLY HOW TO EVEN START AND I DON'T REALLY KNOW WHAT TYPE OF PROBLEMS THEY ARE. HERE IS AN EXAMPLE!!
Given 2 ints, a and b, return their sum. However, "teen" values in the range 13..19 inclusive, are extra lucky. So if either value is a teen, just return 19.
teenSum(3, 4) → 7
teenSum(10, 13) → 19
teenSum(13, 2) → 19
THIS IS ALL THEY GAVE ME
public int teenSum(int a, int b) {
}

This is all i have done so far!
public int teenSum(int a, int b) {
int sum;
sum = a + b;
if ( 14 < sum || 20 < sum ) {
return 19;
return sum;
but then i have a chart that tells me in what parts i have passed it and in what parts i failed.
Function Call     Expected     This Run     Result
teenSum(3, 4)      7     7     PASS
teenSum(10, 13)     19     19     PASS
teenSum(13, 2)     19     19     PASS
teenSum(3, 19)     19     19     PASS
teenSum(13, 13)     19     19     PASS
teenSum(10, 10)     20     19     FAIL
teenSum(6, 14)     19     19     PASS
teenSum(15, 2)     19     19     PASS
teenSum(19, 19)     19     19     PASS
teenSum(19, 20)     19     19     PASS
teenSum(2, 18)     19     19     PASS
teenSum(12, 4)     16     19 FAIL
teenSum(2, 20)     22     19      FAIL
teenSum(2, 17)     19     19      PASS
teenSum(2, 16)     19     19      PASS
teenSum(6, 7)     13     13 PASS
Score: 13 out of 16 (81.2%)

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